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Espinel :: Espinel (n.) A kind of ruby. See Spinel.

Corundum :: Corundum (n.) The earth alumina, as found native in a crystalline state, including sapphire, which is the fine blue variety; the oriental ruby, or red sapphire; the oriental amethyst, or purple sapphire; and adamantine spar, the hair-brown variety. It is the hardest substance found native, next to the diamond..

Ruby :: Ruby (v. t.) To make red; to redden.

Rubying :: Rubying (p. pr. & vb. n.) of Rub.

Rubytail :: Rubytail (n.) A European gold wasp (Chrysis ignita) which has the under side of the abdomen bright red, and the other parts deep bluish green with a metallic luster. The larva is parasitic in the nests of other wasps and of bees..

Rubelet :: Rubelet (n.) A little ruby.

Ruby :: Ruby (a.) Ruby-colored; red; as, ruby lips..

Proustite :: Proustite (n.) A sulphide of arsenic and silver of a beautiful cochineal-red color, occurring in rhombohedral crystals, and also massive; ruby silver..

Ruby :: Ruby (n.) A precious stone of a carmine red color, sometimes verging to violet, or intermediate between carmine and hyacinth red. It is a red crystallized variety of corundum..

Pyrargyrite :: Pyrargyrite (n.) Ruby silver; dark red silver ore. It is a sulphide of antimony and silver, occurring in rhombohedral crystals or massive, and is of a dark red or black color with a metallic adamantine luster..

Ruby-tailed :: Ruby-tailed (a.) Having the tail, or lower part of the body, bright red..

Agate :: Agate (n.) A kind of type, larger than pearl and smaller than nonpareil; in England called ruby..

Carbuncle :: Carbuncle (n.) A beautiful gem of a deep red color (with a mixture of scarlet) called by the Greeks anthrax; found in the East Indies. When held up to the sun, it loses its deep tinge, and becomes of the color of burning coal. The name belongs for the most part to ruby sapphire, though it has been also given to red spinel and garnet..

Spinel :: Spinelle (n.) A mineral occuring in octahedrons of great hardness and various colors, as red, green, blue, brown, and black, the red variety being the gem spinel ruby. It consist essentially of alumina and magnesia, but commonly contains iron and sometimes also chromium..

Ruby :: Ruby (n.) Any species of South American humming birds of the genus Clytolaema. The males have a ruby-colored throat or breast.

Ruby :: Ruby (n.) That which has the color of the ruby, as red wine. Hence, a red blain or carbuncle..

Rubythroat :: Rubythroat (n.) Any one of numerous species of humming birds belonging to Trochilus, Calypte, Stellula, and allies, in which the male has on the throat a brilliant patch of red feathers having metallic reflections; esp., the common humming bird of the Eastern United States (Trochilus colubris)..

Rubellite :: Rubellite (n.) A variety of tourmaline varying in color from a pale rose to a deep ruby, and containing lithium..

Vanadinite :: Vanadinite (n.) A mineral occurring in yellowish, and ruby-red hexagonal crystals. It consist of lead vanadate with a small proportion of lead chloride..

Ruby :: Ruby (n.) The color of a ruby; carmine red; a red tint.

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